首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
考研
Imagine eating everything delicious you want—with none of the fat. That would be great, wouldn’t it ? New "fake fat" product
Imagine eating everything delicious you want—with none of the fat. That would be great, wouldn’t it ? New "fake fat" product
admin
2015-01-15
36
问题
Imagine eating everything delicious you want—with none of the fat. That would be great, wouldn’t it ?
New "fake fat" products appeared on store shelves in the United States recently, but not everyone is happy about it. Makers of the products, which contain a compound called olestra, say food manufacturers can now eliminate fat from certain foods. Critics, however, say the new compound can rob the body of essential vitamins and nutrients(营养物)and can also cause unpleasant side effects in some people. So it’s up to consumers to decide whether the new fat-free products taste good enough to keep eating.
Chemists discovered olestra in the late 1960s, when they were searching for a fat that could be digested by infants more easily. Instead of finding the desired fat, the researchers created a fat that can’t be digested at all.
Normally, special chemicals in the intestines(肠道)"grab" molecules of regular fat and break them down so they can be used by the body. A molecule of regular fat is made up of three molecules of substances called fatty acids.
The fatty acids are absorbed by the intestines and bring with them the essential vitamins A, D, E, and K. When fat molecules are present in the intestines with any of those vitamins, the vitamins attach to the molecules and are carried into the blood stream.
Olestra, which is made from six to eight molecules of fatty acids, is too large for the intestines to absorb. It just slides through the intestines without being broken down. Manufacturers say it’s that ability to slide unchanged through the intestines that makes olestra so valuable as a fat substitute. It provides consumers with the taste of regular fat without any bad effects on the body. But critics say olestra can prevent vitamins A, D, E, and K from being absorbed. It can also prevent the absorption of carotenoids(类胡萝卜素), compounds that may reduce the risk of cancer, heart disease, etc.
Manufacturers are adding vitamins A, D, E, and K as well as carotenoids to their products now. Even so, some nutritionists are still concerned that people might eat unlimited amounts of food made with the fat substitute without worrying about how many calories they are consuming.
What is a possible negative effect of olestra according to some critics?
选项
A、It may increase the risk of cancer.
B、It may spoil the consumers’ appetite.
C、It may impair the digestive system.
D、It may affect the overall fat intake.
答案
A
解析
从文章的第六段可以看出,olestra会阻止维生素A、D、E、K的吸收,也会阻止类胡萝卜素的吸收,而类胡萝卜.素可以减少癌症、心脏病等的发病率,因此olestra的一个消极作用是增加患癌的风险。
转载请注明原文地址:https://kaotiyun.com/show/Kvhi777K
0
在职申硕(同等学力)英语
相关试题推荐
Therearehiddenfactorswhichscientistscall"feedbackmechanisms".Nooneknowsquitehowtheywillinteractwiththechangin
Therearehiddenfactorswhichscientistscall"feedbackmechanisms".Nooneknowsquitehowtheywillinteractwiththechangin
Sometimes,themessagesareconveyedthroughdeliberate,consciousgestures;othertimes,ourbodiestalkwithoutourevenknowi
Revengeisoneofthosethingsthateveryoneenjoys.Peopledon’tliketotalkaboutit,though.Justthesame,thereisnothing
Thebasisofremotediagnosiswillbe______.Thesentence"thecryaskingwhethertherewasadoctorinthehousecouldwellbe
ThecurrentemergencyinMexicoCitythathastakenoverourlivesisnothing.Icouldeverhaveimaginedformeormychildren,
Averyimportantworldproblemistheincreasingnumberofpeoplewhoactuallyinhabitthisplanet.Thelimitedamountoflanda
Somecriminalslangissohighlydevelopedthatpickpockets,forexample,can______aconversationinfrontofavictimwithout
Daltonwonderedwhytheheavierandlightergasesintheatmospheredidnotseparateasoilandwaterdo.Hefinallyconcludedt
Daltonwonderedwhytheheavierandlightergasesintheatmospheredidnotseparateasoilandwaterdo.Hefinallyconcludedt
随机试题
关于药品正确使用方法的叙述不正确的是
A.脱肛B.肛痈C.肛漏D.息肉痔E.肛隐窝炎以大便带血为主要临床表现的疾病是
某单位职工,男性,48岁,平时和同事相处甚难,某同事想让其就诊心理咨询,但该职工坚决反对,心理医师也不主张这样的人来门诊治疗,是因为心理治疗的性质有
男,44岁。3个月前发热、腹痛、腹泻,服药1天好转,此后腹泻反复发作,多于劳累及进食生冷食物后,大便5~6次/日,稀便有黏液,有腹痛、里急后重。体检:左下腹压痛。大便镜检’WBC20~30个/HP,RBC5~10个/HP,发现有结肠阿米巴滋养体,最可能的
以下不属于银行贷款后管理的是()。
中国公民张先生取得财产租赁所得10000元,则张先生应缴纳个人所得税()元。
能够计算概率问题的学生最有可能处于()。
两个相同的玻璃杯都装满糖水,糖与水的比例分别为1:7和1:9。则这两杯糖水混合后的浓度为()。
孔子私学以《诗》《书》《礼》《乐》《易》《春秋》六种典籍教授弟子,这就是“六艺”教育。
随着无线通信技术的发展,用户不受时间地点约束,随时随地访问互联网已经成为现实。目前采用无线方式接入互联网的技术主要有3类,它们是【45】接入、GPRS移动电话网接入和3G移动电话网接入,第1类接入方式必须在安装有【46】的区域中才能接入。
最新回复
(
0
)